(Dezeen) London designer and researcher Shamees Aden is developing a concept for running shoes that would be 3D-printed from synthetic biological material and could repair themselves overnight. Shamees Aden’s Protocells trainer would be 3D-printed to the exact size of the user’s foot from a material that would fit like a second skin. It would react to pressure and movement created when running, puffing up to provide extra cushioning where required.